Spiral-tube-winding machine



A. KING.

SPIRAL TUBE WINDING MACHINE.

APPLlcAxoN FILED JAN. zo. 1919.

1 ,$382,984. Patented June 28,A 1921.

Inventor.'

Z Y v #Wv@ UNITED STATES PATENT OFFICE.

ALBERT lKING@ 0F .SHTON-UNIDER-LYNE, ENGLAND; KA'II-ILEEN WIIFRED KING v ADMINISTRATRIX 0F SAID ALBERT KING, DIEICEASED.v

srrRLAnTUBn-Wmnnve MACHINE.

Application led January 20, 1919.

To all whom it may concern Be it known that I, ALBERT KING, of Manchester road, Ashton-under-Lyne, county of Lancaster, England, have invented certain new and useful Improvements in Spiral-Tube-l/Vinding Machines, of which the following is a specification.

This invention relates to a new or improved attachment, to be placed on a spiral tube winding machine and has' for its object a means of coating the internal wall of spiral wound paper tubing, or other suitable material, with a water proof composition or other compositions, as the tubing leaves the mandrel.

In tubing made of spirally wound strip it is ineiicient to surface or impregnate that face of the first ply strip, which in the finished tube will be inside, while the strip is feeding from the supply roll to the mandrel of the machine because the tube itself will be inadequately protected at the helical Joint.

The present invention overcomes the difficulty in a way extremely favorable to manufacturmg economies by providing means attached as an adjunct to the mandrel whereby the tubing internally is'automatically and continuously surfaced or impregnated with water-resisting or other material applied within the tubing in a fluid or quasi-fluid condition as the tubing is le-aving the mandrel, and distributed over the tubing in ac cordance with the pitch of the windmg.

'I he following is a description of means which the applicant has found to work well.

Through the usual hollow mandrel of a spiral winding machine is conducted a length of tubing connected to a source of surfacing or impregnating material for delivering this material within the tubing as the tubing is leaving the mandrel, and in tandem with the mandrel at its free end a brush or like or equivalent device is attached f or distributing the material evenly and contmuously over the interior` surface of the tubing as the tubing advances with a spiral motlon.

The brush or like or equivalent distributing device should havev a range of action somewhat greater than -the pitch of the winding so that no part of the tubing may escape treatment. 1

For materials not fluid-"or insufliciently fluid at alr temperature, provision must be Specification of Letters Patent.

Patented June 2.8, 1921. Serial No. 272,126.

made for heating the material, and this may be done by arranging a source of heat supply within the mandrel and or interiorly or eXteriorly of the tank or other vessel which contains the surfacing or impregnating material e. g., varnish or paraflin wax.

its conducing to an even distribution of the material over the interior surface of the tubing the delivery within the tubing may be by a spray producing device or nozzle and this when used should be set obliquely to the axis of the tubing so that the axis of the spray cone is incident obliquely to the wall of the tubing. p

Provided that the range of action of the spray is slightly in excess of the pitch of the winding, the use of a brush or like or equivalent distributing device may be suppressed in cases where a less highly finished product is allowable. In general, however, the use of a brush or like or equivalent distributing device will be found to give they best results. I

The invention is illustrated by way of eX- ample in the accompanying drawings, in which- Figure l is a sectional elevation of the usual hollow mandrel of a spiral winding machine having means according to the present invention. attached thereto.

Fig. 2 is a similar part sectional elevation of a slight modification of the arrangement, according to Fig. 1 and Fig. 3 is a sectional elevation of. a spray producing device or nozzle'whic'h has been found to serve well 'with an air pressure feed of the material.

Referring' to the drawings, a designates the usual hollow mandrel of a spiral winding machine. b is a length of pipe conducted through the hollow mandrel so as to extend beyond the free end of the mandrel Y where it is beveled to form a sloping delivery orifice. Y V l At the headstock end of the mandrel a the pipe b is suitably connected to a tank c of surfacing or impregnating material vwhich may be heated by any suitable source of heat nating material in the required state of iiuidity during its rather long passage through the lmandrel a, an inserted perforated steam pipe d willserve, the steam discharged into the mandrel a escaping by the open steam vent e. Otherwise, if electrical energy is available, an electrical heating element may replace the steam pipe.

To the free end of the mandrel and in tandem therewith is attached a brush f, the

diameter of which is such asI to allow thev facing or impregnating material within the tubing' at the rear of the brush f.

A spray producing device or \nozzle which has been found to work` well 's illustrated in Fig. 3 in which the' na ial is radially delivered into an. annular space h in the nozzle and then passed along helical grooves i b which it is given a whirling motion.

he material is broken up into spray by striking against the front of the nozzle before passing out of a taper-pin controlled jet y.

Frovided the range of action of the spray cone is somewhat in excess ofthe pitch of the winding as illustrated by the dottedF lines y Fig. 2, a continuous distribution is possible without the' use of a brush or like or equivalent device but some want of evenness in the distribution will inakeit desirable in general, and especially for a better linished product, to employ a distributing device in conjunction with a spray producing device or nozzle.

Claims:

1. The combination with a mandrel of a tube winding machine, of means for automatically supplying a fluid coating material to the interior surface of a tube, formed on the mandrel, beyond the free -end of the mandrel.

2. The combination with a mandrel of a I tube winding machine, of means projecting beyond the free end of the mandrel within the tube formed on the mandrel and adapted to deliver fluid co-ating material to the inner surface of such tube.

3. The combination with a mandrel of a tube winding machine, of a fluid conduit extending longitudinally of the mandrel and adapted to discharge a fluid coating into the tube formed on the mandrel beyond the end of the mandrel, and means projecting from i the mandrel for spreading such coating over the inner surface of the tube.

4. rl`he combination with a mandrel of a tube winding machine, of means for delivering a fluid coating to the interior of a tube formed on the mandrel, and a brush supported by the mandrel and adapted to be surrounded by the tube passing. from the mandrel and to spread said coating over the interior surface of the tube.

5. The combination with a mandrel offa tube winding machine, of means for delivering a fluid coating to the interior of a tube formed on the' mandrel, and a spreading de- 75 vice supported by the free end of the mandrel and positioned forwardly thereof for uniformly spreading said coating over the inner surface of the tube.

6. The combination with a mandrel of a tube winding machine', of means for spraying ,a coating fluid beyond the free end of the mandrel into the tube formed thereon.

7. The combination with a mandrel of -a tube winding machine, of means for conducting a coating fluid through the free end of the mandrel, and means for discharging said fluid into the tube formed on the mandrel on a line extending obliquely to the axis of the mandrel.

. 8. The' combination with a mandrel of a tube winding machine, of a nozzle projecting obliquely forward from the free end of the mandrel, and means for supplying a coating fluid to said nozzle. 95

9. The combination with a mandrel of a tube winding machine, of a conduit for supplying a coating fluid to the tube produced on the mandrel, said conduit extending through lthe free end ofthe mandrel, and means supported in advance of the-mandrel vfor .spreading the fluid discharged by said conduit over the interior surface of said tube. f

10. The combination with a mandrel of a tube Winding machine, of a conduit extending throughout the length of the mandrel and beyond the free end thereof,a receptacle for coating fluid connected with the rear end of Vsaid conduit, and a spreader supported beyond the free end of the mandrel adapted to spread the coating discharged by the conduit over the interior surface of a tube formed on the mandrel.

11. The combination with a mandrel of a paper or fabric tube forming machine, of means for automatically applying a coating to the interior surface of a tube formed on A the mandrel in advance of the free', delivery, end of the mandrel.

1n testimony whereof I have alhxed my signature in the presence of two witnesses.V

c ALBERT KING. Witnesses: 

